idnr: 467

3
	2
		4
			3

Difficulty: Super easy (0)

idnr: 654

		3	2


1	3

Difficulty: Super easy (0)

idnr: 7

	1
		3
	2
		4

Difficulty: Super easy (0)

idnr: 117

	3
1
			4
		2

Difficulty: Super easy (0)